Ribosomes of Eukaryotic Cell

Q.

What is difference between prokaryotic and eukaryotic ribosomes?

Q.

6. Following are a few definitions of osmosis. Read
carefully and select the correct definition

1. (a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane
   

2. (b) Movement of solvent molecules from its
   higher concentration to lower concentration
   

3. (c) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane

4. (d) Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane.

Q. A cell organelle ‘X’ is divided into two types on the basis of a cell organelle ‘Y’, that helps in the protein synthesis. Identify ‘X’ and ‘Y’ respectively.

1. Golgi complex and ribosome
2. ER and mitochondria
3. ER and Ribosomes
4. Lysosome and ER

Q.

Differentiate between the following:

Osmotic pressure and Turgor pressure.

Q.

Which of the following cell organelle is found in all plant cells, animal cells, and also in bacterial cells?

1. chloroplast

2. cell wall

3. cell membrane

4. nucleus

Q. Mark the correct sequence of steps for the development of root nodules in legumes
A. Formation of infection thread.
B. Division of cortical and pericyclic cells.
C. Curling of root hairs.
D. Leghaemoglobin synthesis.

1. B, D, A, C
2. C, B, A, D
3. C, A, B, D
4. A, C, B, D

Q. What is true about ribosomes?

1. There are composed of ribonucleic acid and proteins
2. These are self -splicing introns of some RNAs.
3. These are found only in eukaryotic cells
4. The prokaryotic ribosomes are 80 S, where 'S' stands for sedimentation coefficient.

Q. Not a function of Endoplasmic reticulum

1. Glycogen storage
2. Intra cellular transport
3. Lipid-synthesis
4. Protein synthesis

Q.

Which of the following could be found in both the nucleus and the cytoplasm?

1. Nucleolus

2. Ribosomes

3. RNA

4. Both RNA & ribosomes

Q.

Is rough ER present in plant and animal cells?

Q.

Intracellular compartments are not found in cells of:

1. Lower plants

2. Prokaryotes

3. Higher plants

4. Eukaryotes

Q. The two subunits of ribosome remain united at a critical ion level of:

1. Magnesium
2. Calcium
3. Copper
4. Manganese

Q. Match the following columns.

Column I	Column II
A. Endoplasmic reticulum	1. Take part in cellular respiration
B. Free ribosome	2. Take part in osmoregulation and excretion
C. Mitochondrion	3. Synthesis of lipids
D. Contractile vacule	4. Synthesise non-secretory proteins

1. (A)→(1), (B)→(2), (C)→(4), (D)→(3)
2. (A)→(3), (B)→(4), (C)→(1), (D)→(2)
3. (A)→(3), (B)→(2), (C)→(1), (D)→(4)
4. (A)→(3), (B)→(2), (C)→(4), (D)→(1)
5. (A)→(2), (B)→(1), (C)→(3), (D)→(4)

Q. DNA is not present in:

1. Mitochondria
2. Chloroplast
3. Ribosomes
4. Nucleus

Q.

How is floating debris removed in the primary treatment of sewage initially?

Q. Which of the following is not membrane bound?

1. Mesosomes
2. Ribosomes
3. Vacuoles
4. Lysosomes

Q. Ribosomes are found in both prokaryotic and eukaryotic cells.

1. True
2. False

Q. Identify the components labelled A, B, C, D, E and F in the diagram below from the list (i) to (vi) given along with:-


Components :
(i) SER (ii) Ribosome (iii) Nucleus
(iv) Cytoplasm (v) Nuclear pore (vi) RER
The correct components are :-

1. A –v, B-i, C-vi, D-iv, E-ii, F-iii
2. A-i, B-iii, C-ii, D-vi, E-v, F-iv
3. A-iii, B-vi, C-i, D-ii, E-iv, F-v
4. A-iii, B-i, C-ii, D-vi, E-v, F-iv

Q. State the major functions of the following:
(a) Plasma membrane (b) Ribosome
(c) Lysosome (d) Mitochondria
(e) Golgi apparatus (f) Cytoplasm
(g) Asters of centrosome (h) Chromosomes
(i) Glycogen granule (j) Vacuoles

Q. Assertion: Ribosomes are considered as the most primitive cell organelles. Reason: Ribosomes do not occur in all prokaryotic organisms.

1. Both Assertion and Reason are false
2. Assertion is true but Reason is false
3. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
4. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Q. After being formed by the ribosomes located on the endoplasmic reticulum, what is the next organelle to which a protein could be transported?

1. mitochondria
2. smooth endoplasmic reticulum
3. Golgi apparatus
4. nucleus

Q. Many ribosomes associate with a single mRNA to form multiple copies of a polypeptide simultaneously. This string of ribosomes are termed as

1. centrosome
2. polyhedral bodies
3. polysome
4. nucleosome

Q.

Spherosomes are involved in

1. Synthesis and storage of vitamins

2. Synthesis and storage of proteins

3. Synthesis and storage of carbohydrates

4. Synthesis and storage of fat

Q. Non membranous structures that are required for protein synthesis:

1. RER
2. Ribosomes
3. SER
4. Lysosomes

Q. Match the following columns.

Column I	Column II
A. Endoplasmic reticulum	1. Take part in cellular respiration
B. Free ribosome	2. Take part in osmoregulation and excretion
C. Mitochondrion	3. Synthesis of lipids
D. Contractile vacule	4. Synthesise non-secretory proteins

1. (A)→(3), (B)→(4), (C)→(1), (D)→(2)
2. (A)→(1), (B)→(2), (C)→(4), (D)→(3)
3. (A)→(3), (B)→(2), (C)→(1), (D)→(4)
4. (A)→(3), (B)→(2), (C)→(4), (D)→(1)
5. (A)→(2), (B)→(1), (C)→(3), (D)→(4)

Q. What is a polysome?

Q. Non membranous structures that are required for protein synthesis:

1. Lysosomes
2. RER
3. Ribosomes
4. SER

Q. What is the use of glycoprotein in Rough ER?

Q. 80s ribosomes can be separated into subunits

1. 70s & 10s
2. 50s & 30s
3. 60s & 40s
4. 60s & 20s

Q.

Question 2

Select one which is not true for ribosome

(a) Made up of two sub-units (b) Form polysome

(c) May attach to mRNA (d) Have no role in protein synthesis